查询词典 differential coefficient

In order to improve the accuracy of the existing transformation ratio model of the hydraulic transformer, a mathematical model is established by introducing the friction coefficient, the viscous drag friction coefficient and the laminar leakage coefficient.

为解决已有的液压变压器变压比模型与实际结果偏差较大的问题，通过对实际工作过程中不应忽略的摩擦与泄漏损失进行研究，引入机械摩擦损失系数、黏性摩擦损失系数和层流泄漏系数，建立了液压变压器变压比模型。

Considering the effects of saturation, pole shape, some important coefficients including the effective pole-arc coefficient, the leakage coefficient, the air-gap coefficient are analyzed by electromagnetic method, and a series of useful curves are given.

考虑磁路饱和、磁极形状等因素的影响，利用电磁场数值解法对电磁计算中的有关系数，包括漏磁系数、计算极弧系数、气隙系数等进行了分析研究，给出了工程实用的曲线。

The plunger stroke loss factor, pump barrel fill coefficient, leakage coefficient and bulk effect coefficient of produced liquid.

有杆抽油系统中抽油泵容积效率的计算一般由柱塞行程损失系数、泵筒的充满系数、漏失系数和抽汲液体的体积效应系数等 4部分构成。

Results An estimate of fixed coefficient, expectation and variance of random coefficient with constraint in the linear model of mixed coefficient is given. At the same time, the nature of the estimate is discussed.

结果 给出了在一定的约束条件下，混合系数线性模型的固定系数，随机系数的数学期望和方差的一种估计，并讨论了该估计的性质。

The content of different nutrient was variated in:change of soil organic matter in the rate of 6.32～35.83 g/kg,the coefficient variation was 29.72%,change of the soil available nutrient content was not the same,to the most obvious avail-P,the rate of change for the 4.00 to 91.60 mg/kg,the coefficient variation 68.81%,avail-N smaller the range, changes in the rate of 40～182 mg/kg,the coefficient of variation was 26.66%.The average of all soil nutrients are in the middle level of the plentiful-lack Index of available nutrient.

涿州市不同元素养分含量变异情况各不相同：土壤有机质变幅不大，变化幅度为6.32～35.83g/kg，变异系数为29.72%；土壤速效养分含量变幅不相同，以速效磷最为明显，变化幅度为4.00～91.60mg/kg，变异系数达68.81%；碱解氮的变幅较小，变化幅度为40～182mg/kg，变异系数达26.66%，各速效养分的平均值均在丰缺指标所划定的中等养分含量水平。

The results showed that the residual yield point stress descended and cushion coefficient increased with the number of vibration and the acceleration increased. Cushion coefficient don't change much in the small stress stage; while in the large stress stage; cushion coefficient increases obviously.

结果表明，随着振动次数、振动加速度的增加，瓦楞纸板剩余屈服应力减小，缓冲系数增大，其中在小应力阶段缓冲系数变化不大，在大应力阶段，缓冲系数显著增大。

The effect of Gurney flap on double delta wing aerodynamics was conducted in low speed wind tunnel,the experimental results indicated that Gurney flap can promote the model s lift coefficient,maximum lift coefficient and lift-to-drag ratio at middle to high lift coefficient.

通过低速风洞实验研究了Gurney襟翼对双三角翼气动特性的影响，结果表明Gurney襟翼可以提高双三角翼的升力系数、最大升力系数以及中高升力系数情况下的升阻比。

Then a model to distinguish skin drag coefficient and form drag coefficient is established based on a floe drag experiment by using a wave-current tank in laboratory, and the quantitative relationship between skin/form drag coefficient and floe geometric parameters is established as a result.

水拖曳系数同海冰几何形态参数的关系才是提高拖曳系数适应性和准确性的最佳途径。

This dissertation is changed into two parts. The first part, the theory and application about Wu-Ritt differential characteristic sequence method are discussed, which involves the theories of differential equations, abstract algebra and computer algebra etc.

本文共分两部分，第一部分讨论微分特征列法的理论和应用问题，涉及到微分方程，抽象代数，计算机代数等重要学科。

In addition also introduced the differential theorem of mean in the proof equality and the inequality, the certificate equation root existence, asks the limit, to ask the approximate value, as well as aspect and so on research function condition should thus deepen to the differential theorem of mean understanding.

此外还介绍了微分中值定理在证明等式和不等式、证明方程根的存在性、求极限、求近似值，以及研究函数性态等方面的应用，从而加深对微分中值定理的理解。

Smoking cigarettes adds to the Computer Desk Computer manufacturer computer mouse Computer Computerized collar knitter machine Conduit Bodies construction board Container Bag Control Arm Cooking Thermometer general levels of air pollution as well as damaging our health.

吸烟不仅对健康有害，而且增加空气污染程度。香烟雾含有多种有害物质：不仅有致癌化学物质、有某种能阻止氧气进入血液的气体，还有引起血压增高、心速加快的被称为尼古丁的物质。

He is one of my favorite actors.

他是我最喜欢的男演员之一。